H7B 3M PELTOR OPTIME Description Description For noise levels up to 101 dBA Stainless steel band distributes weight for low-pressure fit Liquid/foam filled earmuff cushions Noise Reduction Rating (NRRA)*: 26 dB. CSA Class A Related products H10B – 3M PELTOR OPTIME EAR MUFFS 3M2929 3M DUCT TAPE MULTI PURPOSE 6MIL 3M6001 – 3M™ Organic Vapour Cartridge NP102C – DYNA-FIT LITE EARPLUGS 100/BX